fix kcp port print error

server/service.go

@@ -93,7 +93,7 @@ func NewService() (svr *Service, err error) {
 			err = fmt.Errorf("Listen on kcp address udp [%s:%d] error: %v", cfg.BindAddr, cfg.KcpBindPort, err)
 			return
 		}
-		log.Info("frps kcp listen on udp %s:%d", cfg.BindAddr, cfg.BindPort)
+		log.Info("frps kcp listen on udp %s:%d", cfg.BindAddr, cfg.KcpBindPort)
 	}
 
 	// Create http vhost muxer.